<!--  -->
<template>
    <div class=''>
        <!-- 面包屑导航区，图标分隔符 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
            </el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <!-- 提示 -->
            <el-alert type="info" title="添加商品信息" :closable="false" center show-icon></el-alert>
            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <!-- tab标签栏 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addForm" label-width="100px" label-position="top">
                <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave"
                    @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格（元）" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>

                        <!-- 级联选择器 -->
                        <el-form-item label="商品分类" prop="goods_cat">
                            <!-- option指定数据源 -->
                            <!-- props用来指定配置对象 -->
                            <!-- change-on-select 是否允许选择任意一级选项 -->
                            <el-cascader :options="cateList" :props="cateProps" v-model="addForm.goods_cat"
                                expand-trigger="hover" @change="handleChange" clearable>
                            </el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!-- 渲染表单的item项 -->
                        <el-form-item :label="item.attr_name" v-for="(item,i) in manyTableData" :key="i">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="item in onlyTableData">
                            <el-input v-model="item.attr_vals" placeholder=""></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove"
                            list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                            <el-button type="primary" size="mini">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器 -->
                        <quill-editor v-model="addForm.goods_introduce" class="ql-editor"></quill-editor>
                        <!-- 添加商品按钮 -->
                        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>

        </el-card>

        <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
            <img :src="prePath" class="previewImg">
        </el-dialog>

    </div>
</template>

<script>
    //这里可以导入其他文件（比如：组件，工具js，第三方插件js，json文件，图片文件等等）
    //例如：import 《组件名称》 from '《组件路径》';

    export default {
        //import引入的组件需要注入到对象中才能使用
        name: 'Add',
        components: {},
        props: {},
        data() {
            //这里存放数据
            return {
                activeIndex: 0,//控制进度条进度
                addForm: {
                    goods_name: '',//商品名称
                    goods_price: 0,//商品价格
                    goods_weight: 0,//商品重量
                    goods_number: 0,//商品数量
                    goods_cat: [],//商品所属的分类数组
                    pics: [],//图片的数组
                    //商品详情描述
                    goods_introduce: '',
                    attrs: [],//参数
                },//添加商品的表单数据对象
                addFormRules: {
                    goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
                    goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
                    goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
                    goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
                    goods_cat: [{ required: true, message: '请选中商品分类', trigger: 'blur' }],
                },//添加商品的表单校验规则
                cateList: [],//商品分类列表
                cateProps: {
                    label: 'cat_name',
                    value: 'cat_id',
                    children: 'children',
                },
                manyTableData: [],//商品动态参数
                onlyTableData: [],//商品静态属性
                uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
                headerObj: {
                    Authorization: window.sessionStorage.getItem('token')
                },//图片上传组件的请求头对象
                prePath: '',//预览图片path
                previewVisible: false,//控制图片预览对话框显示隐藏
            };
        },
        //监听属性 类似于data概念
        computed: {
            cateId() {
                if (this.addForm.goods_cat.length === 3) {
                    return this.addForm.goods_cat[2]
                }
                return null;
            }
        },
        //监控data中的数据变化
        watch: {},
        //方法集合
        methods: {
            //获取商品分类信息
            async getCateList() {
                const { data: res } = await this.$http.get('categories');
                if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
                this.cateList = res.data;
            },

            //级联选择器选中项变化触发这个函数
            handleChange() {
                //设置只能选中3及分类
                if (this.addForm.goods_cat.length !== 3) {
                    this.addForm.goods_cat = []
                    return
                }
            },

            //监听标签切换
            beforeTabLeave(activeName, oldActiveName) {
                // console.log('即将离开的标签页：：'+oldActiveName);
                // console.log('即将去往的标签页：：'+activeName);
                if (oldActiveName === '0' && (this.addForm.goods_name === null || this.addForm.goods_name === '')) {
                    this.$message.error('请输入商品名称');
                    return false;
                }
                if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                    this.$message.error('请选择商品分类');
                    return false;
                }
            },

            //监听标签栏点击事件
            async tabClicked() {
                //访问的是动态参数面板
                if (this.activeIndex === '1') {
                    //获取动态参数列表数据
                    const { data: res } = await this.$http.get('categories/' + this.cateId + '/attributes/', {
                        params: {
                            sel: 'many'
                        }
                    })
                    if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
                    res.data.forEach(item => {
                        item.attr_vals = item.attr_vals.length === 3 ? [] : item.attr_vals.split(' ');
                    })
                    this.manyTableData = res.data;
                    //    console.log(res);
                }

                //访问的是静态属性面板
                else if (this.activeIndex === '2') {
                    const { data: res } = await this.$http.get('categories/' + this.cateId + '/attributes/', {
                        params: {
                            sel: 'only'
                        }
                    })
                    if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
                    this.onlyTableData = res.data;
                }
            },

            //图片预览
            handlePreview(file) {
                this.prePath = file.response.data.url;
                this.previewVisible = true;
            },

            //移除图片
            handleRemove(file) {
                //1、获取将要删除的图片的临时路径
                const path = file.response.data.tem_path;
                //2、从pics数组中，找到这个图片对应的索引值
                const index = this.addForm.pics.findIndex(x => {
                    x.pic === path
                });
                //3、调用数组的splice方法，移除pic
                this.addForm.pics.splice(index, 1);
            },

            //监听图片上传成功的方法
            handleSuccess(response) {
                // console.log(response);
                //1、拼接得到一个图片信息对象
                const picInfo = { pic: response.data.tmp_path }
                //2、将图片信息push到pic数组中
                this.addForm.pics.push(picInfo);
            },

            //添加商品
            add() {
                this.$refs.addForm.validate(async value => {
                    if (!value) return this.$message.error('请填写必要的表单项!');

                    //执行添加商品的业务逻辑
                    this.addForm.goods_cat = this.addForm.goods_cat.join(',');
                    //处理动态参数
                    this.manyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals.join(' '),
                        };

                        this.addForm.attrs.push(newInfo);
                    })
                    //处理静态属性
                    this.onlyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals
                        }
                        this.addForm.attrs.push(newInfo);
                    })

                    // console.log(this.addForm);
                    const { data: res } = await this.$http.post('goods',this.addForm)
                    if (res.meta.status !== 201) return this.$message.error(res.meta.msg);
                    this.$message.success(res.meta.msg);
                    this.$router.push('/goods');//跳转到商品列表页面
                })


            },


        },
        //生命周期 - 创建完成（可以访问当前this实例）
        created() {
            this.getCateList();//获取商品分类信息
        },
        //生命周期 - 挂载完成（可以访问DOM元素）
        mounted() {

        },
        beforeCreate() { }, //生命周期 - 创建之前
        beforeMount() { }, //生命周期 - 挂载之前
        beforeUpdate() { }, //生命周期 - 更新之前
        updated() { }, //生命周期 - 更新之后
        beforeDestroy() { }, //生命周期 - 销毁之前
        destroyed() { }, //生命周期 - 销毁完成
        activated() { }, //如果页面有keep-alive缓存功能，这个函数会触发
    }
</script>
<style scoped lang='scss'>
    .el-tag {
        margin: 10px;
    }

    .el-checkbox {
        margin: 0 5px 0 !important;
    }

    .previewImg {
        width: 100%;
    }

    .btnAdd {
        margin-top: 15px;
        margin-left: 15px;
    }
</style>